Roll harfbuzz-ng to 1.0.5

third_party/harfbuzz-ng/src/hb-ot-shape.cc

 /*
  * Copyright © 2009,2010  Red Hat, Inc.
  * Copyright © 2010,2011,2012  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
  * above copyright notice and the following two paragraphs appear in
@@ skipping 284 matching lines @@
   {
     /* Same loop as hb_form_clusters().
      * Since form_clusters() merged clusters already, we don't merge. */
     unsigned int base = 0;
     unsigned int count = buffer->len;
     hb_glyph_info_t *info = buffer->info;
     for (unsigned int i = 1; i < count; i++)
     {
       if (likely (!HB_UNICODE_GENERAL_CATEGORY_IS_MARK (_hb_glyph_info_get_general_category (&info[i]))))
       {
-        buffer->reverse_range (base, i);
         if (buffer->cluster_level == HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS)
           buffer->merge_clusters (base, i);
+        buffer->reverse_range (base, i);
+
         base = i;
       }
     }
-    buffer->reverse_range (base, count);
     if (buffer->cluster_level == HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS)
       buffer->merge_clusters (base, count);
+    buffer->reverse_range (base, count);
 
     buffer->reverse ();
 
     buffer->props.direction = HB_DIRECTION_REVERSE (buffer->props.direction);
   }
 }
 
 
 /* Substitute */
 
@@ skipping 558 matching lines @@
   hb_set_t copy;
   copy.init ();
   do {
     copy.set (glyphs);
     for (hb_codepoint_t lookup_index = -1; hb_set_next (&lookups, &lookup_index);)
       hb_ot_layout_lookup_substitute_closure (font->face, lookup_index, glyphs);
   } while (!copy.is_equal (glyphs));
 
   hb_shape_plan_destroy (shape_plan);
 }